1. BobW said:

Shalom Andrew,

Here in Virginia, this wouldn't be prostitution but statutory rape. Even in California, Roman Polanski got in trouble because the girl was 13.

From a book on Islam I've got; "Another form of marriage in Islam is called mutah. It is defined as 'a special contract concluded between a man and a woman through offer and acceptance of marriage for a limited period of time and with a specific dowry..."
...
"The children of such marriages are legitimate and have the same rights as the children of a permanent marriage."
...
"Apparently this form of temporary form of marriage was practiced in Muhammad's day, and he allowed it to continue. Sunnis insis that it was prohibited later, while the Imamis, the largest Shiite group, believe it is still in effect.".

Kol tuv,
BobW